Decide if your device is static or not using the accelerometer

Add the following code to the onCreate()/onResume() method:

SensorManager sensorManager;
Sensor mAccelerometer;
final float movementThreshold = 0.5f;  // You may have to change this value.
boolean isMoving = false;
float[] prevValues = {1.0f, 1.0f, 1.0f};
float[] currValues = new float[3];

sensorManager = (SensorManager)getSystemService(SENSOR_SERVICE);
mAccelerometer = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
sensorManager.registerListener(this, mAccelerometer, SensorManager.SENSOR_DELAY_NORMAL);

You may have to adjust the sensitivity by adapting the movementThreshold by trial and error. Then, override the onSensorChanged() method as follows:

@Override
public void onSensorChanged(SensorEvent event) {
    if (event.sensor == mAccelerometer) {
        System.arraycopy(event.values, 0, currValues, 0, event.values.length);
        if ((Math.abs(currValues[0] - prevValues[0]) > movementThreshold) ||
                (Math.abs(currValues[1] - prevValues[1]) > movementThreshold) ||
                (Math.abs(currValues[2] - prevValues[2]) > movementThreshold)) {
            isMoving = true;
        } else {
            isMoving = false;
        }
        System.arraycopy(currValues, 0, prevValues, 0, currValues.length);
    }       
}

If you want to prevent your app from being installed on devices that do not have an accelerometer, you have to add the following line to your manifest:

<uses-feature android:name="android.hardware.sensor.accelerometer" />

Found a mistake? Have a question or improvement idea? Let me know.

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